Thats a tricky part but you can check it by disabling ignition logic in radio and check than if it still draws than cim etc can be excluded from list otherwise it works like
Cim - wake up signal- radio screen etc
Remember one funny thing in vivaro 08 with cd30 and tid
Radio was off but screen was on but it wasnt displaying anything as one of fuses was blown by chart fuse wasnt related to infotaiment just marked with battery mark
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